Wristwatch



FIG. 1 is a top plan view of a writstwatch showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a front end view thereof;

FIG. 4 is a rear end view thereof;

FIG. 5 is a left side thereof;

FIG. 6 is a right side view thereof; and,

FIG. 7 is a top left perspective view thereof. 

The ornamental design for a wristwatch, as shown and described. 